21970715

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{337}}^1$

素因数の和:431

約数の個数: 32

約数和(自身を含む): 30663360

約数和(自身を除く): 8692645

約数列:

[1, 5, 13, 17, 59, 65, 85, 221, 295, 337, 767, 1003, 1105, 1685, 3835, 4381, 5015, 5729, 13039, 19883, 21905, 28645, 65195, 74477, 99415, 258479, 338011, 372385, 1292395, 1690055, 4394143, 21970715]

約数ペア:

[(1, 21970715), (5, 4394143), (13, 1690055), (17, 1292395), (59, 372385), (65, 338011), (85, 258479), (221, 99415), (295, 74477), (337, 65195), (767, 28645), (1003, 21905), (1105, 19883), (1685, 13039), (3835, 5729), (4381, 5015)]